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SN74LVC574A-Q1

更新时间： 2024-01-26 23:33:53
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德州仪器 - TI 触发器输出元件
页数 文件大小 规格书
11页 219K
描述
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP WITH 3-STATE OUTPUTS

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SN74LVC574A-Q1 数据手册

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SN74LVC574A-Q1  
www.ti.com ............................................................................................................................................... SCAS715B–SEPTEMBER 2003–REVISED APRIL 2008  
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP  
WITH 3-STATE OUTPUTS  
1
FEATURES  
DW OR PW PACKAGE  
•
Qualified for Automotive Applications  
(TOP VIEW)  
•
ESD Protection Exceeds 2000 V Per  
MIL-STD-883, Method 3015; Exceeds 200 V  
Using Machine Model (C = 200 pF, R = 0)  
OE  
1D  
V
CC  
1
2
3
4
5
6
7
8
9
10  
20  
19  
1Q  
2D  
3D  
4D  
5D  
18 2Q  
17 3Q  
•
•
•
•
Operates From 2 V to 3.6 V  
Inputs Accept Voltages to 5.5 V  
Max tpd of 7 ns at 3.3 V  
16  
15  
14  
13  
12  
11  
4Q  
5Q  
6Q  
7Q  
8Q  
CLK  
Typical VOLP (Output Ground Bounce) < 0.8 V  
at VCC = 3.3 V, TA = 25°C  
6D  
7D  
8D  
GND  
•
•
•
Typical VOHV (Output VOH Undershoot) > 2 V at  
VCC = 3.3 V, TA = 25°C  
Supports Mixed-Mode Signal Operation on All  
Ports (5-V Input/Output Voltage With 3.3-V VCC  
)
Ioff Supports Partial-Power-Down Mode  
Operation  
DESCRIPTION/ORDERING INFORMATION  
The SN74LVC574A octal edge-triggered D-type flip-flop is designed for 2.7-V to 3.6-V VCC operation.  
This device features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance  
loads. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working  
registers.  
On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels at the data (D) inputs.  
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or  
low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the  
bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines  
without interface or pullup components.  
OE does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered  
while the outputs are in the high-impedance state.  
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,  
preventing damaging current backflow through the device when it is powered down.  
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup  
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.  
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of thIs device as a translator in  
a mixed 3.3-V/5-V system environment.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2003–2008, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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SN74LVC574A-Q1 替代型号

型号 品牌 替代类型 描述 数据表
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